arm64: dts: qcom: sc7280: Add ports subnodes in usb/dp qmpphy node

Add the USB3+DP Combo QMP PHY port subnodes to facilitate the
description of the connection between the hardware blocks.

Put it in the SoC DTSI to avoid duplication in the device DTs.
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20230929-sc7280-qmpphy-ports-v2-1-aae7e9c286b0@fairphone.comSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/sc7280.dtsi

@@ -3404,6 +3404,32 @@ usb_1_qmpphy: phy@88e8000 {
 
 			#clock-cells = <1>;
 			#phy-cells = <1>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+
+					usb_dp_qmpphy_out: endpoint {
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+
+					usb_dp_qmpphy_usb_ss_in: endpoint {
+					};
+				};
+
+				port@2 {
+					reg = <2>;
+
+					usb_dp_qmpphy_dp_in: endpoint {
+					};
+				};
+			};
 		};
 
 		usb_2: usb@8cf8800 {